Cutting method of glass tube for pre-filled syringe

• Main Authors: ZHU YONGJIANG, CHEN GUOAN, ZHANG WENYANG, HAN SHANGCHI, YU CHANGLONG, YAN CHAOYUE, SUN SHENGZHI, ZHANG JINYUN
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

The invention discloses a method for cutting a glass tube for a pre-filled syringe, which comprises the following steps of: performing equal-interval ablation by using ultrafast picosecond pulse laser and a Bessel beam to generate a plurality of equal-interval penetrating cracks, and cutting a medical glass tube made of a large-diameter material in combination with a specific cold burst process, so that the generation of scraps can be greatly reduced or avoided, and the cutting efficiency is improved. The structure and the performance of the glass at the cutting part are kept unchanged. 本发明公开了一种预灌封注射器用玻璃管的切割方法，用超快皮秒脉冲激光以贝塞尔光束进行等间隔烧蚀，以生成等间距的众多贯穿性裂孔，并结合特定的冷暴工艺来切割大直径材料的医用玻璃管，可大大减少或避免碎屑的产生，保持切割部位玻璃结构和性能不发生变化。